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Chapter 2
Board Installation
The Tomcat i815e uses a 64-bit data path from memory to CPU and can accommodate
up to 512MB of SDRAM. The 168-pin DIMMs (Dual In-line Memory Modules)
!
must be of the 3.3V, unbuffered variety. The position of the notch in the SDRAM
key position will tell you whether or not a DIMM is unbuffered (see the Figure 2-5
important!
below). All installed memory will be automatically detected, so there is no need to set
any jumpers.
Some details of memory installation:
• The mainboard supports 32MB, 64MB, 128MB, and 256MB unbuffered DIMMs.
• There is a limit of two double-sided PC-133 DIMMS that can be installed.
• No ECC type memory can be used.
• Warning! DO NOT use registered DIMMs. (Check with your memory dealer
warning
for more information). See www.tyan.com for the latest memory compatibility
information.
The table below shows some of the possible memory configurations. Not all
possible configurations are listed.
D
I
M
M
3
2
M
6
4
M
3
2
M
6
4
M
6
4
M
1
2
8
1
2
8
2
5
6
Unbuffered
RFU
Buffered
B
a
n
k
1
D
I
M
M
B
x
1
3
2
M
0
3
2
M
B
x
1
3
2
M
B
x
1
3
2
M
B
x
1
6
4
M
0
6
4
M
B
x
1
1
2
8
M
0
1
2
8
M
M
B
x
1
1
2
8
M
0
1
2
8
M
M
B
x
1
2
5
6
M
0
2
5
6
M
M
B
x
1
2
5
6
M
0
2
5
6
M
168-pin DIMM
Figure 2-5
B
a
n
k
2
D
I
M
M
B
B
x
1
0
B
x
1
3
2
M
B
0
B
x
1
x
1
B
3
2
M
B
0
B
x
1
B
x
1
6
4
M
B
B
x
1
B
x
1
6
4
M
B
B
x
1
0
B
x
1
1
2
8
M
B
x
1
0
B
x
1
1
2
8
M
0
B
x
1
B
x
1
2
5
6
M
20
EEPROM
a
n
k
3
T
o
t
a
6
4
M
B
x
1
6
4
M
9
6
M
9
6
x
1
M
2
8
1
M
2
8
x
1
1
M
1
9
2
M
x
1
1
9
2
M
2
5
6
M
B
x
1
2
5
6
M
3
8
4
M
3
8
4
M
B
x
1
5
1
2
M
B
x
1
5
1
2
M
http://www.tyan.com
l
B
B
B
B
B
B
B
B
B
B
B
B
B
- Quick Links:
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